Y66 — Nonadministration of surgical and medical care
Is Y66 billable?
Yes — Y66 is billable for FY2027. Y66 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Y66 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Y66 at a glance
| Code | Y66 |
|---|---|
| Description | Nonadministration of surgical and medical care |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is Y66 listed in the External Cause Index?
These are the routes through the External Cause of Injuries Index that lead to Y66 — how the injury happened, rather than what the injury was.
- Premature cessationsurgical and medical care (of)
- Nonadministration › surgical and medical care (of)
Excludes1 — never code together
The conditions below can never be reported together with Y66 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Inclusion terms
Alternative wording in documentation that is classified to Y66.
- Premature cessation of surgical and medical care
Excludes1 — never code together — inherited from Y62-Y69
The conditions below can never be reported together with Y66 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- surgical and medical procedures as the cause of abnormal reaction of the patient, without mention of misadventure at the time of the procedure (Y83-Y84)
Excludes2 — not included here — inherited from Y62-Y69
The conditions below are not part of Y66, but a patient may have both at the same time. When documentation supports it, Y66 and the excluded code may both be reported.
- breakdown or malfunctioning of medical device (during procedure) (after implantation) (ongoing use) (Y70-Y82)
How long has Y66 existed?
Y66 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with Y66?
ICD-10-CM declares these codes mutually exclusive with Y66 — exactly one of each pair can be correct for a given encounter.